Process for the treatment of leather



Fetented Friar. l2, lQZ

All

stare rarer ALFRED OWEN ronnencn nnannraonn, or TORONTO, ONTARIO, CANADA.

PROCESS FOR THE TREATMENT OF No Drawing.

Hides are disfigured by scars resulting from healed wounds, scratches, and cuts, and pr ticularly by those resulting from the activi-:

ties oi various insects parasitic in vertebrate animals, and the hides of the Bovi'dae are particularly susceptible to disfigurement by the .warble lly. This fly deposits its larva to hatch and live in and on the hide organism of the living animal, and causes while in a maggot state the formation of a tumor which, when tl e fly develops from the maggot, bursts and lib rates it, and thenheals but leaves a- "ed to a processor method, for the etl'acement' part or obliteration of the scars, and comprises the tollo sequence of steps: f v (a) Subjecting the tanned hide, when taken from the dry loft in a thoroughly dried condition, to moisture until the water absorbed ranges from to of the weight of the leather;

(b) Placing the moistened hide in a pile, in closed room, at ordinary atmospheric temperature and keeping it free from air currents until the moistureshas penetrated evenly to all parts of the fibre, so that it can be compressed into a dense mass;

(c) Spraying the surface of the hide, while in a thoroughlymoistened condition, with a mixture of mineral and vegetable oils heated to a temperature of approximately l lG' for penetrating the grain and preventing the burning of the leather by the burnishing roll; (CZ) Rough rolling the moistened and sprayed hide for packing the fibre and smoothing the tin, and V (e) i re oil sprayed and i burnishedhide wl V e iii-the m i tened conr ion to the compressing action of an embossing surface, whicl may be a disc, roll or plate. 7

The embossing operation is conducted at a temperature of from toll0 E, to avoid varying or affecting the color of the leather, 7

and at a'pressure oiapproximately-12,000 lbs. per sqv inch for making anaccurate im print of theembossed designon the leather and for closely packing or compressing the Application filed March 24,1928. Serial No. 264,574.

fibre into a denser mass than in its natural state and thus developing to the maximum degree its wearing and water resisting qua'lities. e j

The process is primarily devised for the treatment of vegetable tanned sole leather which visibly displays on the grain side scars resulting from any cause whatever, but it may also be employed fertile-treatment or ornamentation of other leathers as it is not intended that it should be confined merely to the obliteration of scars or blemishes.

Having thus fully described my invention,

what 1 claim as new and desire to secure by Letters Patent is l. A proc'essifor the treatment of leather "which consists of subjecting the tanned hide to moisture until the Water absorbed ran ges from 20% to 25% of the weight of the leather,

placing the moistened hide in a-closed room at ordinary atmospheric temperatureand keeping it free from air currentsuntil the moisture has penetrated evenly to all parts" of the fibre, spraying the surface of the hide While in a thoroughly moistenedcondition with a mixture of mineral and vegetable oils heated to a temperatureof approximately 1&0? F, rough rolling the moistened and sprayed hide for packing the. fibre and smoothingthe grainpand then subjecting it While still moistenedto the action of an embossing surface.

A process for the treatment of leather which consists of subjecting the tanned hide to moisture until the water absorbed ranges from 20% to 25% of the weight of the leather, placing the moistened hide in a closed room at ordinary atmospheric temperature and keeping itfree from 'air cirrents until the moisture has penetrated evenly to all parts of the fibre, spraying the surface ofthe hide while in a thoroughlymoistened. condition witha mixture of mineral and vegetable oils heated to a temperature of approximately,

MO l1, rough rolling the moistenedfland sprayed hide for packing the fibre and smoothing the graimfand then, subjecting it while still moistened to the action of an en bossi'ng surface operating at a pressure of approximately 12,000lbs. per sq inch at a temperature ranging from 80 lZO ZllJO FL Dated at the city of Toronto,,in the county of York, and Province of Ontario, Dominion of Canada, this 27th day ot' February, 1928.

ALFRED OWEN'TORRANCE eraser/roar. 

